Cross-Linked Potato Starch for Drilling Fluids from Germany
Cross-linked potato starch is a chemically modified starch where the granules are treated with cross-linking agents to improve stability in high-temperature, high-shear environments. It is used primarily as a viscosifier in oilfield drilling fluids, where it helps control fluid loss and maintain rheological properties. This product falls under tariff item 3505.10.19 as an etherified or esterified starch other than cationic potato starch for papermaking.
Duty Rate — Germany → Canada
Import Tips
• Ensure the starch is clearly labelled as chemically modified and not pregelatinized, as the latter falls under a different tariff item
• Provide a technical data sheet to the CBSA showing the cross-linking agent used, to support classification under 3505.10.19
• If the starch is mixed with other additives, verify whether it qualifies as a separate product or a preparation of Chapter 38